Yes, a road trip in the US is cool, but I would never ever do it for just getting somewhere.

There is another nice public transport system called airplanes. Works pretty well, is comfortable, and is fast. It works also pretty well in the US. I used it several times as my frequent millage card tells me.

BTW: The US aren't that big compared to Europe. Don't mix up US and Russia, which interestingly many Amercians do, as they believe that the US is the biggest country in the world. Actually, Russia is the biggest country in the world, size wise.

I take it you mean the EU - which covers less than half the area of Europe?